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The Definitive Guide to Power Query (M)

You're reading from   The Definitive Guide to Power Query (M) Mastering complex data transformation with Power Query

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Product type Paperback
Published in Mar 2024
Publisher Packt
ISBN-13 9781835089729
Length 758 pages
Edition 1st Edition
Languages
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Authors (3):
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Greg Deckler Greg Deckler
Author Profile Icon Greg Deckler
Greg Deckler
Melissa de Korte Melissa de Korte
Author Profile Icon Melissa de Korte
Melissa de Korte
Rick de Groot Rick de Groot
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Rick de Groot
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Toc

Table of Contents (19) Chapters Close

Preface 1. Introducing M FREE CHAPTER 2. Working with Power Query/M 3. Accessing and Combining Data 4. Understanding Values and Expressions 5. Understanding Data Types 6. Structured Values 7. Conceptualizing M 8. Working with Nested Structures 9. Parameters and Custom Functions 10. Dealing with Dates, Times, and Durations 11. Comparers, Replacers, Combiners, and Splitters 12. Handling Errors and Debugging 13. Iteration and Recursion 14. Troublesome Data Patterns 15. Optimizing Performance 16. Enabling Extensions 17. Other Books You May Enjoy
18. Index

Working with mixed structures

This section focuses on structured values that contain structures of a different type. Although a wide range of scenarios is possible, we cannot possibly illustrate them all; however, this section should provide enough insight into how to tackle the most common challenges you are likely to encounter.

Lists of tables, lists, or records

As demonstrated earlier, handling a list of items that share a consistent structure and are grouped together can easily be managed and converted to a table. This approach is incredibly powerful and applies equally to working with a single column in a table or converting lists in every table row in a table to reshape the data.

Let’s explore the first scenario, dealing with columns that contain structured values. Imagine a table organized in the following manner:

  • Table values
  • List of lists, where each inner list represents column values
  • List of lists, where each inner list represents...
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